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Holley Carb 0-81570 |
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LakesideRamblin 
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Joined: Dec/21/2015 Location: So. California Status: Offline Points: 2694 |
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 Topic: Holley Carb 0-81570Posted: Oct/10/2017 at 3:19pm |
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Anyone using this carb? If so, any feedback? Thanks.
https://www.summitracing.com/parts/hly-0-81570 Matt |
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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Sonic Silver
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Posted: Oct/10/2017 at 3:34pm |
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LakesideRamblin
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Posted: Oct/10/2017 at 6:20pm |
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Thanks, I have a somewhat mild 360. My builder thinks the 570 CFM is perfect for my street engine in my 69 Rambler. I will also ask Tony.
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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akimmet
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Posted: Oct/11/2017 at 10:38am |
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Sadly the Holley Street Avenger carburetors have misleading CFM numbers.
Keep these numbers in mind when buying a Street Avenger. The 570 is a 465 The 670 is a 600 The 770 is a 750 The 870 is a 850 So with these numbers in mind I would normally pick a 600 CFM carburetor for a slightly modified 360ci engine. therefore the "670" would be a better choice. Also be aware that some people have had tuning issues with the 570 and 670 Street Avengers. If you are interested in the Street avenger series, also look into AED and Quick Fuel. Both of these companies make excellent Holley clones. Quick Fuel is actually owned by Holley now. |
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LakesideRamblin
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Posted: Oct/11/2017 at 11:52am |
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Thanks akimmet. Boy, are they misleading in their advertising. The Summit Racing website lists explicitly lists the 0-81570 as a 570 CFM. I appreciate your information very much.
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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Greyhounds_AMX
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Posted: Oct/11/2017 at 12:38pm |
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Strangely, Holley also lists the 81570 as 570 cfm:
What is leading you to believe differently, akimmet?
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1968 AMX 390 w/T5
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Greyhounds_AMX
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Posted: Oct/11/2017 at 12:49pm |
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I'll reply to my own question -
It appears people have measured the throttle bore and venturi diameter and they are essentially the same as a 465 cfm carb. That is a very odd thing indeed.
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1968 AMX 390 w/T5
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LakesideRamblin
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Posted: Oct/11/2017 at 1:43pm |
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I will call Holley and get the scoop. 600+ CFM is too big for my optimum application. But 465 may be too small and not appropriate either.
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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Midnight Rambler
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Posted: Oct/11/2017 at 1:50pm |
FWIW I have a 500cfm on my 290. I'd use it on a 304, and I would probably go 600cfm max on a 343 or mild 360. I think a 465cfm carb on a 360 might leave some hp on the table. |
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 '66 American 440 Convertible 290/M-40/AMC 20 3.15/PS/PB '04 Jeep Wrangler X Rocky Mountain Edition 4.0 5sp |
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LakesideRamblin
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Posted: Oct/11/2017 at 1:54pm |
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Called, they said wet testing is at 570 CFM. Don't know why you would dry test it if it runs on gasoline but I am in the learning mode.
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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LakesideRamblin wrote: